Driving-gear mechanism.



R. STUHLMAGHER.

DRIVING GEAR MBCHANISM.

APPLIUATION FILED SEPT. zu, 1910.

986241. y Patentedmanzwu.

y mu

UNITED STATES PATENT OFFICE.

RICHARD STUHLMACHER, or REICHENBR'AND, NEAR CHEMNITZ, GERMANY, AssmNoRTo WANDERER-WERKE voRMALs WINKLHCFER UNnJaENICKE AKTIEN-GESELL- sCHarr,or sCHNAU, NEAR CHEMNITLEGERMANY.

DRIVING-GEAR MECHANIS-IVI.

Specification of Letters Patent.

Patented Mar. '7, 1911.

Application led September 29, 1910. Serial No. 584,537.

vemployed'in practice, for instance in connection with a change-speedgearing and in thls form is illustrated by way of example in theaccompanylng drawing in which:

Figure 1 represents a vertical section of a gearing with the newmechanism in lateral elevation. Fig. 2 is a vertical section viewed fromthe front. Fig. 3 illust-rates the guide as seen in Fig. 1, when viewedin the direction of the arrow m. Fig. 4 is a rear view of Fig. 1 viewedin the direction of the arrow y.

Rotatably journaled in the gear casing 1 is the driving shaft 2 of anintermediate gear. Secured to the shaft 2 is a pulley 3 and secured on ashaft 4 is the gearing train comprising the pinions 5, 6, 7, 8, 9.

The two gear wheels 10 and 11 are rotatably journaled in a member 12which' is rotatably and late-rally movable on the shaft 2. The wheel 11is arranged on the shaft 2 so as to be movable in the longitudinaldirection on the shaft, but is not loosely rotatable' thereon.v Thelever-shaped end of the member 12 is provided with a guide pin 13engaging with a guide 15 having a zigzag groove 14 (Fig. 3). In causingthe pin 13 to move in the zigzag groove 14, the member 12 is alternatelydisplaced along the shaft 2 and moved angularly thereon repeatedly untilthe pin 13 has traveled through all stages in the zigzag shaped groove14. The object of this yalternating movement is -in this-example tocause the pinion 10 to be thrown into successive engagement with thevarious gear wheels 5, 6, 7, 8, 9..

Mounted on the member 12 is a downwardly depending gear segment 16 ofsuch breadth as to remain in engagement with a gear' 17,

angular rotation about the shaft 2.

during the displacement of the member 12 on the shaft 2. The two gearmembers 16 and 17 form a skew gearing. The wheel 17 is fast 'on a shaft18 carrying at its forward end a hand crank 19. The handle 2() of thiscrank is provided with a spring actuated'pin 20 adapted to engage withholes 21 in a segment so as to enable the crank and the wheel 17 to belocked in positions in which it is desired to effect the engagement ofthe' pinion 10 with t-he various gear wheels 5, 6, 7, s, 9.

The use and operation of this device are effected in the followingmanner. In the position shown in the drawing the pinion 10 is inengagement with the largest gear wheel 9. If it is desired to throw thepinion 10 into engagement with the gear wheel S, the crank 19 is rockedfrom the position shown in Fig. 4, until the pin 20 snaps into the nextfollowinghole 21. By this simple rotation-of the crank 19 the member 12is caused to perform a combined movement, viz first of all a rectilinearmovement in the` axial direction of the shaft 2, and then an The causeof this combined movement is the zigzag shape of the guide groove 14 andthe result of this movement consists in the pinion 10 being firstmovedlaterally out of engagement with the teeth of the gear wheel 9, and thenthrown into engagement with the teeth of the gear wheel 8. The firstportion of this combined movement is brought about by t-he guide pin 13(Fig. 1) moving in the zigzag groove from the point 22 to the point 23(Fig. 3). During this first partial movement the wheel 17 acts on thesegment 16 in the same manner as if 16 were not a cylindrical pinion buta straight rack. The second part of the combined movement is produced bythe guide pin 13 (Fig. 1) being caused to move in the zigzag groove fromthe point 23 to point 24 (Fig. 3). During this second partial movementthe wheel 17 acts on the segment 16 in an ordinary n'ianner, that is tosay the segment 1G is rotated about the shaft 2. Thus in moving thecrank 19 uniformly from the position shown in Fig. 4, along thesemi-circular segment 21,

it will be seen that, this rotary movement is converted into a zigzagmovement of the member 12 guided by the pin 13 in the groove 14C beingalternately displaced and rotatet` on the shaft 2, as Will be readilyunderstood. i

lfVhat I elaim and desire to secure by Letters Patent is:

1. In driving` gear mechanism the combination of a guide, a memberCooperating with the said guide, a skew gear for operating the saidmember and means for operating` the Said skew gear so as to Cause thesaid' member to` travel along the turns of the said guide, substantiallyas set forth.

2. In drivingr gear mechanism the combination of a guide, la membercooperating with the said guide, a gear carrier connected to the saidmember` a skew gear element connected to the said carrier, a skew Wheelcooperating with the said gear element and means for uniformlyrotatii'iLL/J` said Wheel to a determined extentthereby causing the Saidmember to travel along determined turns of the said guide, substantiallyas sett'orth.

il, In driving' gear mechanism the combination of a gu'ide, a membereoperating with the said guide, a shaft, a gear carrier movable on androtatable on the shaft, a pinion mounted to move on said shaft and torotate therewith, a gear element on the said carrier and a driven Wheelengaging with the said gear element all substantially as described.

4T. ln driving gear mechanism the combination of a guide, a membercooperating With the said gui-de, a shaft, a gea-r carrier movable onand rotatable on the shaft, pinion mounted to move on said shaft and torotate therewith, a gear element on the .said carrier and a driven Wheelengaging with the said gear element, and a number of gears with whichthe said pinion is caused to successively engage for the purpose setforth.

In testimony whereof I have allixed my ISignature in presence of twoWitnesses.

RICHARD STUHLMACHER. [L.s.]

Witnesses:

WM. WASHINGTON BnUNSwioK, MAX J. BENNDORF.

